Soil Texture • The texture of a soil is its appearance or “feel” and it depends on the relative sizes and shapes of the particles as well as the range or distribution of those sizes. Coarse-grained soils: Gravel Sand Fine-grained soils: Silt Clay 0.075 mm (USCS) Sieve analysis Hydrometer analysis

Characteristics (Holtz and Kovacs, 1981)

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Grain Size Distribution (Cont.) • Engineering applications-Visualization of soil texture and used for soil classification (next topic).-It can be used to define the grading specification of a drainage filter (clogging).-It can be a criterion for selecting fill materials of embankments and earth dams, road sub-base materials, and concrete aggregates.-It can be used to estimate the results of grouting and chemical injection, and dynamic compaction.-The grain size distribution is more important to coarse-grained soils.-

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